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sealant

Sealant is a substance used to block the passage of fluids through the surface or joints or openings in materials, a type of mechanical seal. In building construction sealant is sometimes synonymous with caulking and also serve the purposes of blocking dust, sound and heat transmission. Sealants may be weak or strong, flexible or rigid, permanent or temporary. Sealants are not adhesives but some have adhesive qualities and are called adhesive-sealants or structural sealants.

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  1. S

    Is this a weep hole?

    Hi Just moved into a house and in process of renewing sealant around the shower cubicle. Feel free to skip to the bottom to get the question! There’s a gap (20mm in length & 3mm height) at the bottom of the frame (where it meets the shower tray) closest to the wall that appears to have been...
  2. M

    Sealant for external flue run.

    Hi all. Got to run a Vailliant flue externally and been told by vailliant I need a heat resistant flexible silicone. Can anyone recommend which silicone to go for? Cheers
  3. K

    Recommendations for a sealant for misaligned bath overflow

    hi all, I'm just sorting the drainage for my freestanding bath. Due to a slight misalignment of the drainage / manufacturing error I'm unable to get the rubber seal for the overflow totally compressed up against the bath. Any recommendations on an alternative to the rubber gasket like Plumbers...
  4. S

    What is acetone sealant?

    I have a waste pipe to install and it's giving this warning "Acetoxy sealants must not be used, as they may be detrimental to the plastic used in the manufacture of this gully." What exactly are the acetoxy sealants to be avoided? Be really grateful for any advice Thank you
  5. C

    How do I remove sealant around shower taps?

    Hi. I recently bought a house and the shower is leaking. I'm guessing it just needs the washers replaced. However, when I started to have a look I noticed some kind of sealant between the tap body and the opening in the tiles. I can't get to the tap with a spanner to unscrew it as the sealant is...
  6. B

    Difference between mastic and sealant

    Total plumbing-tiling novice. Our bathroom has been tiled. What should we use where the walls meet and where the tiles meet the ceiling - mastic, sealant or caulk? I'm confused about the difference and have had varying advice. Once it's sealed, can I cover the edges (ceiling, floor, wall to...
  7. M

    Tru-Blu pipe thread sealant

    Has anyone used this, and if so, what are your thoughts? From the descripton it sounds like it should work a bit like Loctite 577, but is loads cheaper. Im wondering if it would be good for rad tails and jointing up male / female irons...
    • MOSSEP
    • Thread
    • america pipe sealant thread usa
    • Replies: 5
    • Forum: USA
  8. D

    Adding Sealant to CH system - Old Radiators and Conventional Boiler

    Hi folks, I have had issues with the central heating plumbing leaking, in this (very old) house, over the last 4 or 5 years since I moved in. I know a plumber who added Fernox sealant and after this failed to work, Corgi sealant to the system, which stopped the pressure from dropping for a...
    • Deleted member 120051
    • Thread
    • adding boiler central heating system conventional hot water old radiators sealant system
    • Replies: 4
    • Forum: DIY Plumbing Forum
  9. B

    Leaking sealant

    I have a shower over the bath, the tiling was done after the bath was fitted and as far as I can work out there must be a gap between the bath and the wall. During a shower the water drips through the kitchen ceiling below. I have sealed it many, many times, and I've currently resorted to thick...
  10. L

    Low temprature oil tank thread sealant?

    Happy New Year all! New Year new problems..... I have a new Titan oil tank to connect up replacing a similar un bunded one. No problem, fitted the original many years ago, I have my boiler on a temporary tank but I need to get the tank fittings on to get it filled. The 1" fitting in brass needs...
  11. M

    Strong sealant for shower waste

    Can anyone recommend a good strong sealant that will also glue a shower waste to underneath the shower tray. I need to temporarily fix the waste that has dropped. All screw fixings are broken and I cannot get access underneath. Will have the shower ripped out early next year.
    • miketurner201
    • Thread
    • america glue sealant shower shower waste strong usa waste
    • Replies: 9
    • Forum: USA
  12. soother

    System Sealant tales?

    Every time system sealant is mentioned as a fix for central heating leaks there are warnings that it will clog up the system or seal up something that it shouldn't. Do you folks have any horror stories or experience of these bad effects?
    • soother
    • Thread
    • america sealant system usa
    • Replies: 7
    • Forum: USA
  13. soother

    Ideal logic primary heat exchanger leak sealant success?

    A mate tells me he cured a heat engine leak on this boiler (confirmed by boiler isolation & dripping condensate drain) by adding K-Seal car type sealant, and It's still ok after 5 years. Has anyone else had success curing these leaks with sealant additives?
    • soother
    • Thread
    • america exchanger heat heat exchanger ideal ideal logic leak logic primary sealant usa
    • Replies: 7
    • Forum: USA
  14. G

    Silicon sealing a back to the wall WC pan

    The pan is screwed down using a Screwfix/Rawlplug fitting kit and I have sealed the pan to the wall tiles. My question is: Do I need to also seal the pan to the floor tiles? I think it looks neater without silicon to the floor tiles and it would create a sealed void should the cistern inlet...
    • GerryB
    • Thread
    • america pan sealant sealing silicon usa wall
    • Replies: 7
    • Forum: USA
  15. S

    Large gap discovered when resealing shower tray

    I have encountered a problem. My shower tray was leaking and I found out it was because the tray was flexing and causing a gap at the seal. I thought this would be an easy fix and have taken the seal off. Turns out this is not the case as the gap between the seal and the tiles is about 1cm tall...
    • Stewstew
    • Thread
    • america gap large sealant shower shower tray tray usa
    • Replies: 5
    • Forum: USA
  16. J

    Leak in bath sealant

    Hi lads, So I think these gaps in the bath sealant (we use the bath for showers) is responsible for a leak that occurs in one of the rooms downstairs. I have two questions: a) there's a huge gap at the corner of the bath, which probably needs sealing too and b) do I have to remove the old...
  17. R

    Which adhesive and/or sealant would you say is the best?

    The question is in the title.
  18. greekengineer

    loctite 55 as thread sealant

    Hello to all engineers,what is your opinion with regard to using loctite 55 as thread sealant? LOCTITE 55 – Thread Sealing - Information & support - Loctite
  19. A

    Concealed connection - tape or thread sealant

    Hi I have a Grohe concealed shower valve I’m in installing and the casing it has 1/2 inch BSP-P female threads built into the box. Therefore I need to attach 1/2 inch BSP male to 15mm fittings to allow me to connect up the pipes. As I will be tiling over I wanted to ensure the best libg term...
  20. G

    What sealant do you recommend?

    Hi. I work in a care home and the sprinkler system tank is leaking from a weld in the tank. What sealant do you recommend using on a permanently wet surface, with the tank still filled with water? Thank you in advance.
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