--- product_id: 58061508 title: "SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow" brand: "sika" price: "$32.26" currency: USD in_stock: false url: https://www.desertcart.us/products/58061508-sika-sika-boom-180-expanding-foam-gaps-and-cracks-sealant store_origin: US region: United States of America --- # Light green blends with nature Sets in minutes Works from -22°F to 130°F SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow **Brand:** sika **Price:** $32.26 **Availability:** ❌ Out of Stock ## Summary > 🌟 Secure your posts like a pro—fast, flawless, and built to last! ## Quick Answers - **What is this?** SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow by sika - **How much does it cost?** $32.26 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/58061508-sika-sika-boom-180-expanding-foam-gaps-and-cracks-sealant) ## Best For - sika enthusiasts ## Why This Product - Trusted sika brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid-Set Power:** Get your posts stable in minutes, not hours. - • **All-Weather Warrior:** Reliable performance from freezing cold to scorching heat. - • **Effortless Mix & Apply:** Mixes right in the bag—no mess, no fuss, just snip and stir. - • **Seamless Natural Blend:** Light green foam that disappears into your yard’s landscape. - • **Universal Post Protector:** Perfect for wood, steel, aluminum, and PVC posts alike. ## Overview Sika Postfix Fence Post Mix is a light green, mix-in-the-bag expanding foam designed to quickly seal and support non-structural posts such as fences, mailboxes, and signage. It sets within minutes, blends naturally with outdoor surroundings, and withstands extreme temperatures from -22°F to 130°F. Compatible with wood, steel, aluminum, and PVC, it offers a mess-free, durable solution for professional-grade post installation. ## Description When erecting mailboxes, signage, fencing, or lamp posts, this Sika pro select foam concrete mix offers a premier solution for sealing and protecting the base of the posts. It's pre-proportioned for better quality control and reliable performance, and it mixes directly in the bag in seconds — just snip the corner and pour. It sets within minutes, so you can get more done in less time. Use it for posts made of wood, steel, aluminum, and PVC. Be sure to protect from high heat, as it may cause the bag to burst. For best performance, store at temperatures ranging from 41 to 89 °F. Condition mix to between 65 to 77 °F for at least 2 hours prior to use. ## Features - PROTECTS BASE OF POST FOR GREATER DURABILITY — Sika PostFix mix is the perfect choice for sealing and supporting fence posts, mailbox posts, lamp posts, signage posts, and more - FAST SETTING — Once mixed together, the foam mix quickly expands and sets, fully setting within mere minutes. Make sure your post is up and ready, because this mix works fast - BLENDS NATURALLY — The light green color of the foam allows it to blend easily with grassy natural surroundings such as yards, fields, and landscaping - SUITABLE FOR COLD WEATHER — Once set, Sika post fence mix will withstand temperatures as cold as -22 °F and as warm as 130 °F, compatible with a wide range of regions and conditions - QUICK AND EASY PREP — Sika fence post mix foam mixes right in the bag. Even better, you only need a few seconds to stir components together and it's ready. No messy containers to clean up ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01N1Q5YNE | | Best Sellers Rank | #260,468 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Decking Posts | | Brand | SIKA | | Brand Name | SIKA | | Color | Light Green | | Compatible Material | Alloy Steel, Aluminum, Polyvinyl Chloride, Wood | | Customer Reviews | 4.4 out of 5 stars 468 Reviews | | Global Trade Identification Number | 00815202002611 | | Included Components | Sika - 483503 | | Item Dimensions | 8.5 x 9.8 x 2 inches | | Item Form | Foam | | Item Type Name | Sika - 483503 | | Item Weight | 2.5 pounds | | Item dimensions L x W x H | 8.5 x 9.8 x 2 inches | | Manufacturer | Sika USA | | Material | Polyurethane | | Material Type | Polyurethane | | Model | Sika - 483503 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | Sika - 483503 | | Style | Industrial | | Style Name | Industrial | | UPC | 815202002611 | | Unit Count | 1 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** SIKA - **Item Weight:** 2.5 pounds - **Item dimensions L x W x H:** 8.5 x 9.8 x 2 inches - **Material:** Polyurethane - **Style:** Industrial ## Images ![SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow - Image 1](https://m.media-amazon.com/images/I/81wKN2k+qdL.jpg) ![SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow - Image 2](https://m.media-amazon.com/images/I/919OJ0srCcL.jpg) ![SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow - Image 3](https://m.media-amazon.com/images/I/91iEzgH6dlL.jpg) ![SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow - Image 4](https://m.media-amazon.com/images/I/81AiOPmQhrL.jpg) ![SIKA Sika Boom 180 Expanding Foam Gaps and Cracks Sealant, 750 mL, Light Yellow - Image 5](https://m.media-amazon.com/images/I/81d2+F6EW0L.jpg) ## Questions & Answers **Q: Am i missing something or is this way more expensive than concrete? I know concrete can be a pain, but this stuff looks to be 4 or 5 times the price.** A: Yes, this is way to expensive. Home Depot and Lowes in Texas sells it for 9.88 a bag **Q: Can I mix in a container other than the bag to use smaller amounts at a time?** A: This product appears to be a typical two-part expanding polyurethane foam. These are not particularly unusual products. They are usually not air-activated. You mix the two chemicals together in equal parts and then fairly quickly the reaction takes place and the liquid expands into a rigid foam. You could probably extract equal portions of the two chemicals from the two pouches, but really since you're here on Amazon just search for expanding polyurethane foam and you'll find the chemicals in various quantities where you won't have to deal breaking into the bag and then storing the ruptured bag(s). **Q: Can this be used to set Deck Posts?** A: Its advertised to do so but I have not used mine...waiting on spring **Q: Is this strong enough for deck posts that only come up 2 feet? What is the expansion volume for a bag?** A: No. Concrete for beck posts ## Frequently Bought Together - SIKA MIX FENCE POST 980ml per 10 EA - Johnson Level & Tool 175-O Orange Post & Pipe Level, 4" x 5" x 9", Orange, 1 Level - H.B. Fuller Fast 2K Fence Post Mix and Concrete Alternative and Replacement for Fence Post and Mail Post Installs. 32.8 oz Bag of Expanding Composite Footing Compound --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/58061508-sika-sika-boom-180-expanding-foam-gaps-and-cracks-sealant](https://www.desertcart.us/products/58061508-sika-sika-boom-180-expanding-foam-gaps-and-cracks-sealant) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-18*