Can this be use around boiler pipe?

It's worked fine around central heating pipes in floors Check working temps on tube to see range it covers

It it suitable for bigger gapps .like around 20 x 10 cm ? If not, what would be the righy solution?

Not sure what the depth of your hole is or where it is. That size would have to be done in stages if just using this and it takes a few days to dry. Wire mesh - available on Amazon might be easier in combination with this?

How thick is this sealant i.e. how small can I cut the nozzle hole to? I have a fiddly job and need to add a length of tube

It isn’t that thick so you can cut the tube quite small. Takes longer but you can always increase the size.

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RENTOKIL Mouse & Rat Gap Sealant - Waterproof Sealant - 300ml

RENTOKIL Mouse & Rat Gap Sealant - Waterproof Sealant - 300ml

Product ID: 50797999

💧300ml waterproof sealant

🔧easy caulking gun application

🦷anti-chew sticky core

$39.15

Duties & taxes included

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Description

🚫🐭 Seal the deal, keep rodents out in style!

ANTI CHEW CORE - Sticky interior deters gnawing, protecting your space
RODENT PROOF SEAL - Blocks pencil-width gaps rodents squeeze through
TRUSTED EXPERTISE - Backed by 100+ years of Rentokil pest control innovation
SIMPLE APPLICATION - Smooth on with any standard caulking gun for instant protection
WATERPROOF WEATHERPROOF - Durable seal that withstands outdoor elements

RENTOKIL Mouse & Rat Gap Sealant is a 300ml waterproof, anti-chew sealant designed to block small entry points rodents exploit. Its unique sticky core deters gnawing while forming a durable, weatherproof barrier. Easy to apply with a caulking gun, it offers a professional-grade solution trusted by Rentokil’s century-long pest control expertise.

Specifications

ASIN	B01DKA14OW
Best Sellers Rank	5,366 in DIY & Tools ( See Top 100 in DIY & Tools ) 122 in Sealers
Customer Reviews	4.3 4.3 out of 5 stars (599)
Date First Available	29 Mar. 2016
Item model number	FMS01
Manufacturer	Rentokil
Part number	FMS01
Power source type	AC
Product Dimensions	5 x 5 x 23.5 cm; 240 g

Reviews

I**S

Works well, stays soft

This works well. Not so easy to spread as silicone or caulk. It’s also quite messy so be cateful. Despite what others have said it does cure but still stays a bit soft. Kind of like putty. Not an issue though as you’ll use it in places nobody can see.

23.06.2026

K**R

It's worked ok for a bit not every time

8.07.2026

S**E

Perfect for the job, if a little pricey

Perfect for the job, although I wish it came it smaller sizes as I still have about 3/4 left and it's quite expensive.

29.04.2025

I**N

Great

great product and done the job perfectly.

22.01.2026

S**D

Not dry after 9 days and is still soft

It’s been 9 days since I used this product and it’s still soft and wettish, I used it for indoors and not sure why it’s not 100% dry yet

15.01.2026

B**X

Good

Did the job of sealing up gaps in my home. I coated it above wire mesh wool for extra peace of mind and so far so good..nothing has chewed through old entry points

21.11.2025

P**F

Blocking Mouse entry

The product was delivered promptly. It is simple to use and (so far) effective. The metallic content should deter any nibbling.

18.12.2024

L**A

Doesn’t work

Pointless

30.07.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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