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  Importancia de la calidad  
     
 

Sealing in carpentry may often seem insignificant and price may be the only criterion for choosing a sealant. However, like any other material, sealants have a limited mechanical resistance and capacity to withstand atmospheric agents. Products with limits that exceed the requirements of normal use should therefore be applied. These should be recommended by specialised manufacturers who have a thorough enough research programme to be able to design each product to suit the requirements of its application. This is the only way to prevent the costly, difficult to repair damage that can be caused by a bad sealant (which ranges from 10 to 100 times greater than the saving attained in buying cheap material)

The purchased product should bear a trustmark that guarantees quality and total compliance with the technical specifications. Users should bear in mind the manufacturer's recommendations to enable them to choose the product that best suits their needs. The application of a high-quality product is a guarantee of competitiveness, performance and savings.
     
 
   
Coste de "No calidad"
  The following model, based on the value for money study of a window manufacturer, is an example of how much not using a quality product can cost:
   
  For an average-quality window with an opening of 1.00 x 1.20 m, the estimated costs are as follows:
   
Costs of sealant:
   
Billed price (new window) glazing and fitting included: 200 euros.
   
Cost of sealing the carpentry work on the site (labour and fitting materials): 10 euros
   
Difference between the cheapest and most expensive sealants on the market for a 4.4-m perimeter: 0.60 euros.
   
Cost of non-quality arising from defective application of the sealant:
   
Removal of old sealant, cleaning of the joint and application of new sealant: approximately 60 euros. Removing the sealant without damaging the window can be very costly.
   
Repair of interior damage caused by the filtration of water: can be very high. Several times the cost of the whole window.
   
   
 
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