Flomasta External Leak Sealer 50g (8487J)

£ 3.15INC VAT

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Flomasta External Leak Sealer 50g (8487J)

Single-part silicone leak sealer for all types of joints and fittings. Ideal for temporary repairs. Cures in 1 hour. Adheres to most wet or dry surfaces. Does not shrink and remains flexible, allowing seal to be undone.

  • 1 Year Guarantee
  • Ready to Use
  • Cures in 1 Hour
  • Resealable Tube

More Info

View all: Flomasta Sealers & Compounds

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Rated 5 out of 5 by from It's good I haven't opened it yet, but if as good as other users said it is then I can't wait to use it.
Date published: 2021-05-20
Rated 4 out of 5 by from Easy to use, fast setting. Handy small tube easy to use and sets fairly fast.
Date published: 2021-04-30
Date published: 2021-04-22
Rated 5 out of 5 by from Effective sealant Flomasta sealer was purchased to stop seepage past two difficult-to-reach bolts at base of cistern. This seems to have been achieved even though only one bolt could be loosened. The sealer was applied over the top.of the other and seems to have provided adequate seal. It is too early to judge how longlasting the remedy will be.
Date published: 2021-04-21
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Can this be used on top of silicone? If so, does it form a hard wearing seal that can be cleaned?
Asked by: CJW99
This product is a clear silicone so it is probably pointless to use on top of what you already have used.
Answered by: Water Treatment Expert
Date published: 2021-04-27

Rubber pipes

Will this seal and stick rubber pipe and rubber connector.
Asked by: HughV
The product will certainly work as a gasket between the two surfaces - but it’s effectiveness will be dependent upon the water pressure - low pressure is likely to be ok.
Answered by: Water Treatment Expert
Date published: 2021-03-17

Can you use on wood, corner of shed ?

Asked by: Dogalog
This product is primarily intended to be used in plumbing applications - but the silicon sealant properties will probably work in the application you suggest but cannot be guaranteed.
Answered by: Water Treatment Expert
Date published: 2021-02-08

Would this work on a small hole on the arm of a kitchen mixer tap? When the tap is on, water is squinting out of the hole at a right angle.

Asked by: Anonymous
This product works best as gasket material between two mating surfaces. The pressure of the water may push out the plug. Also bear in mind that the acid cure could stain any chrome finish to the tap and this product is not WRAS approved - so should not be used on potable drinking water.
Answered by: Water Treatment Expert
Date published: 2021-05-25

Pin hole leak in bottom of cold water tank

Can this be used to seal a small leak in a loft cold water tank? It is near the bottom of the tank .
Asked by: Dovid1
Hello Dovid1, This will be fine for a quick repair however we would not recommend this for long term repair. Thank you for using Screwfix Q&A. A.K.C.
Answered by: AliScrewfix1
Date published: 2020-08-17
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Brand Flomasta
Label Info 1: Signal Word Danger
Label Info 2: Hazard Statements H315 Causes skin irritation.H318 Causes serious eye damage.
Label Info 3: Precautionary Statements P102 Keep out of reach of children.P280 Wear protective gloves/protective clothing/eye protection/face protection.P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.P310 Immediately call a POISON CENTRE/doctor/ …P332 + P313 If skin irritation occurs: Get medical advice/ attention.P501 Dispose of contents/container to …P264 Wash … thoroughly after handling.P302 + P352 IF ON SKIN: Wash with plenty of water/…P321 Specific treatment (see … on this label).P362 + P364 Take off contaminated clothing and wash it before reuse.
Label Info 5: Hazardous Chemical Content Methylsilanetriyl triacetate
Manufacturer Guarantee 1 Year Guarantee
Pack Size 1
Pieces in Pack/Case 1
Product Type External Leak Sealer
Volume 50 g


Safety Data Sheet (COSHH)