--- product_id: 17723784 title: "Sink Faucet Knockout Set FK8001 (4 pc)" price: "$91.73" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/17723784-sink-faucet-knockout-set-fk8001-4-pc store_origin: US region: United States of America --- # Reusable for multiple castings Precise 1 3/8" & 2 3/8" void sizes Durable polyurethane rubber molds Sink Faucet Knockout Set FK8001 (4 pc) **Price:** $91.73 **Availability:** ✅ In Stock ## Summary > 🛠️ Mold your masterpiece with precision and ease! ## Quick Answers - **What is this?** Sink Faucet Knockout Set FK8001 (4 pc) - **How much does it cost?** $91.73 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/17723784-sink-faucet-knockout-set-fk8001-4-pc) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless mold removal:** Tapered design ensures quick, damage-free extraction from concrete countertops. - • **Comprehensive user support:** Includes detailed instructions and expert tips for flawless concrete casting every time. - • **Cost-efficient reusability:** Reusable molds reduce material waste and save time on every casting cycle. - • **Precision-engineered voids:** Creates exact 1 3/8" and 2 3/8" diameter knockouts for seamless faucet and hardware installation. - • **Professional-grade durability:** Crafted from abrasion-resistant polyurethane for long-lasting use in demanding projects. ## Overview The GlobMarble FK8001 Sink Faucet Knockout Set features four durable polyurethane rubber molds designed to create precise 1 3/8" and 2 3/8" diameter voids in concrete countertops. Engineered for professional use, these reusable molds offer abrasion resistance and easy removal, streamlining faucet and hardware installation while saving time and materials. ## Description SINK FAUCET KNOCKOUT SET FK 8001 Rubber molds have the abrasion resistance and tear strength needed to keep production moving. Casting concrete into rubber molds lets you make perfect copies of any original every time! Concrete Stone Molds are ready for casting same day and last in production...saving you time, labor, and material costs. Urethane molds are used everyday by professionals to make architectural elements, concrete stone veneer, formliners, concrete countertops, GFRC panels, concrete statues and furniture and the list goes on. These molds can be used over and over. You are purchasing urethane rubber mold designed for casting plaster, concrete and polymer concrete. 1 set- 4 molds. Rubber plug forms size: 2 x 1 3/8"(2.54cm) diameter x 2" tall (5 cm) approximately, 2 x 2 3/8"(5.08 cm) Big End diameter and 1 3/8" small end x 2" tall. These concrete stone molds are easy to use, and each purchase comes with an instruction sheet with information and tips on: mixing and pouring concrete, coloring the stone, releasing the casting. Please note: The stone making instruction will be sent to buyer's email address by request. The stone making instruction also available on GlobMarble web site. We manufacture all of our own products and have an unlimited supply. Review: These work fantastic and are great quality - fast shipping - I've used these as knockouts for faucets and soap dispensers. They work fantastic and are worth the investment. Review: Good product - Perfect for knock outs on concrete countertops, also reusable. ## Features - Sink Faucet Knockout Set FK 8001 - Globmarble supplies professional grade casting molds which reproduce the structure and relief of natural stone to the smallest details. - Molds made of two-component polyurethane or silicone rubber proved their high quality and durability. - Durable polyurethane rubber faucet forms for concrete/cement counter top faucet knockouts. Faucet Forms cast a 1 3/8" diameter void in your concrete countertop for easy installation of faucet fixtures, control valves, and dishwasher vents. Self sealing, reusable for multiple concrete castings and tapered for easy removal. Leaves a 1- 3/8" void and 2 3/8" void for mounting hardware. - 1 set- 4 molds. Rubber plug forms size: 2 x 1 3/8"(2.54cm) diameter x 2" tall (5 cm) approximately, 2 x 2 3/8"(5.08 cm) Big End diameter and 1 3/8" small end x 2" tall ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.1 out of 5 stars 31 Reviews | ## Images ![Sink Faucet Knockout Set FK8001 (4 pc) - Image 1](https://m.media-amazon.com/images/I/412k9vY2DXL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ These work fantastic and are great quality - fast shipping *by P***E on August 7, 2018* I've used these as knockouts for faucets and soap dispensers. They work fantastic and are worth the investment. ### ⭐⭐⭐⭐⭐ Good product *by K***M on August 6, 2019* Perfect for knock outs on concrete countertops, also reusable. ### ⭐⭐⭐⭐ fantastic. *by S***T on August 16, 2016* These did exactly what I needed them to do in 2" concrete. They'd be better if they had a hole pre-drilled in the center for a screw, but I figured it out...Oh, and I had to peel off a fair amount of flashing...but that's really my only gripe. They stayed in place and came out fairly easily post-cure. And they survived, so I can use them again for a future pour. --- ## 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/17723784-sink-faucet-knockout-set-fk8001-4-pc](https://www.desertcart.us/products/17723784-sink-faucet-knockout-set-fk8001-4-pc) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-25*