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Review of Caravans Plus Service
Water entry can cause serious damage to your Caravan or Motorhome. It is important to check your seals regularly against fatigue and degeneration. It is imperative that the seals on your Caravan or Motorhome remain 100% water tight, else you could be up for some very costly repairs.
Over the years many types of sealants have been used to not only join components used when manufacturing the caravan or RV, but also to seal against water and dust penetration.
For many years caravans were sealed using a a Butyl Rubber / Mastic or sometimes known in Australia as Caulking compound.
This type of sealant is a non-hardening, water and dust proofing compound that forms a tough skin but should remain permanently soft and sticky beneath.
There have been many versions of this caulking compound that have been used by Caravan manufactures since the 1960's. Many dry out and crack leaving a gap that water can penetrate and cause damage to the walls and ceilings.
Some caravans were also built where the caulking compound was too soft and tended to run out and drip during very hot weather.
Despite these problems it is still often the best solution to use a quality proven caulking compound where you know you will need to remove the items that are being sealed.
It can be a popular choice for those who are restoring a vintage caravan and would like to keep everything original. It is useful on vents that are removed to access items behind.
Silicone sealants have been widely used by for many decades now. They allow for greater flex than the above mastic products. They are considered to be a step up in technology from Butyl Mastic sealants.
There is a large range of silicones for different jobs. You may have noticed there are silicones for plumbing, bathroom/kitchen, glazing to name a few, yet not all silicones are the same.
a) Silicone Sealant V2 - Acetic cure
There are many silicones available from your hardware store that are suitable for your bathroom and kitchen areas. In wet areas, ensure you select a product that is anti fungal. The Acetic cure silicones like V2 release acid while curing which facilitates etching of the surface and a superior adhesion to smooth surfaces like glass and ceramics.
This is NOT recommended for the external seal of joints on Caravans & Motorhomes.
b) Silicone Sealants V60 - Neutral Cure
Bostik's V60 white glazing silicone is used by a number of the major caravan manufactures in Australia for sealing the outsides of their caravans. In some cases, it has been re-packaged and sold as Caravan Sealant.
For the most part, a caravans outer shell is sealed using Neutral cure Silicone. The ACETIC silicones release acid while curing, and while it gives superior bonding to certain surfaces like ceramic and glass, it can cause corrosion to the painted and powdercoated surface and soft metals like the aluminium. We do NOT recommend ACETIC for Caravan and motorhome sealing
Not recommended for doors and windows - see foam tape
To see our full range of sealants, click the link below
Polyurethane sealants are becoming more common place within the industry. As more caravans and RV's shift towards fibreglass panels, the use of single component polyurethane sealants such as Matrix FC or Sikaflex 221 is increasing.
This product is used for making joints between panels with a high joint strength. It also has excellent UV, chemical and weathering properties.
This type of sealant displays excellent adhesion, chemical and weathering properties, as well as the added advantage over traditional silicone in that it is both sand-able and paintable. Interestingly, it is also anti fungal.
a) Silyl Modified Polymer (SMP)
The most commonly used product in this range is Simson ISR 70-03 based on (SMP). It is highly used within the United States RV and motorhome industry, particularly by some of the more well known motorhome manufacturers.
These are not currently stocked by Caravans Plus, but are recommended for joints with fibreglass sheets, and where permanent strong adhesion is required for structural strength.
They also provide a waterproof seal.
For more specifications about product...Click here.
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